JPS6320537B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an X-ray imaging apparatus used for circulatory system diagnosis.

In circulatory system diagnosis, for example, in diagnosing heart disease, angiography is performed to improve diagnostic ability. By the way, as is well known, the heart is made up of approximately four chambers, three valves, and coronary arteries surrounding the heart, so depending on the direction of X-ray exposure, for example, atria and ventricles may overlap, or blood vessels may overlap. Accurate diagnosis is difficult due to overlapping factors. Therefore, recently, images of the heart are taken from different directions (for example, from the front side and from the side side) to improve diagnostic performance and prevent misdiagnosis.

Conventionally, when taking images from the two directions, for example, separate X-ray imaging devices were prepared for the front and side views, and these were combined. For this reason, when imaging is performed at various angles, interference occurs between devices, making it difficult to perform imaging at all angles, and thus there is a limit to the ability to improve diagnostic performance. In addition, because different devices are combined, operability is poor and positioning, etc., takes time. Furthermore, when multiple devices are combined, the overall size of the device becomes large, which poses a problem in that the installation location and range of use are restricted.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide an X-ray imaging apparatus that has excellent operability, occupies a small area, and can improve diagnostic performance.

The present invention will be specifically explained below using Examples.

FIGS. 1a and 1b are configuration diagrams of an embodiment of an X-ray diagnostic apparatus according to the present invention. As shown in the figure, this X-ray imaging device is attached to a moving block 2, and is rotatably attached to the bottom of the moving block 2 via a bearing 2A in the direction of arrows _C1 - _C2 with a pivot 2B as a vertical rotation axis. a forked support arm 4, an outer ring 5 supported by the forked support arm 4, and an inner ring 11 rotatably disposed within the outer ring in the direction of arrows _A1 - _A2 ; An X-ray tube 21a and an imaging device (for example, an image intensifier) 22a are arranged facing each other on the inner ring, and an X-ray tube is arranged facing each other in a direction different from the arrangement of the X-ray tube 21a and the imaging device 22a. 21b, and an imaging device 22b. Rollers 3 are attached to both sides of the moving block 2, and the moving block 2 is horizontally moved along a guide rail 1 fixed to the ceiling (D ₁ ,
D ₂ directions). The bifurcated support arm 4 can rotate in the horizontal direction (directions C ₁ and C ₂ in the figure) by having a rotating shaft 2A provided above supported within the moving block 2. The tip of the support arm is bent into an L-shape as shown in FIG. The outer ring 5 has a pair of protrusions 5a on both sides thereof corresponding to the L-shaped bent portions of the support arm 4, and coaxial horizontal rotation shafts 6a-6b attached to the protrusions 5a. The support arm 4 is rotatably attached to the L-shaped bent portion of the support arm 4 in the direction of arrows _B1 - _B2 . Further, a guide groove 5b is formed in the front part of the inner peripheral surface of this outer ring 5, and an internal gear 5c is formed in the rear end part. The inner ring 11 is arranged at intervals within a concentric circle of the outer ring 5, and has four retaining rods 14 extending outwardly at equal intervals on its outer circumferential surface. The inner peripheral surface of the outer ring 5 is brought into contact with the inner peripheral surface of the outer ring 5 via a pair of rollers 12 and 13 provided at the outer ring 5. That is, one roller 12 among the rollers 12 and 13 is guided by a groove 5b formed on the inner peripheral surface of the outer ring 5, and the other roller 13 rolls on the inner peripheral surface of the outer ring 5. It is configured to roll on top. Further, an L-shaped mounting plate 18 that reaches near the outer ring 5 is attached to the rear side of the inner ring 11, and a motor 17 is installed at the tip of the mounting plate 18. The rotating shaft of this motor 17 is connected to a reducer 16, and the rotating shaft of the reducer is connected to a pinion 15 that meshes with an internal gear 5c provided on the inner peripheral surface of the outer ring 5. Therefore, by rotating the motor 17, the pinion 1
5, the inner ring 11 becomes rotatable in the circumferential direction (direction _A1 - _A2 in the figure). At this time,
The holding rod 14 and rollers 12, 13 attached to the inner ring 11 function as guides for smooth circular movement. Furthermore, four mounting brackets 2 are provided at equal intervals on the front wall of the inner ring 11.
X-ray tubes 21a and 21b are attached to a pair of adjacent mounting brackets 20a, and another pair of adjacent mounting brackets 20
Two imaging devices 22a and 22b are attached to the upper part of the image pickup apparatus b via a holding mechanism that can move laterally (in directions F ₁ and F ₂ in the figure) and up and down (in directions E ₁ and E ₂ in the figure).
That is, one X-ray tube 21a and imaging device 22a and the other X-ray tube 21b and imaging device 2 are arranged facing each other.
2b are arranged in directions perpendicular to each other. Note that 8 is a subject placed approximately in the center of the apparatus, 9 is a top plate, 10 is a bed, and 7 is, for example, the heart. In addition, in Figure 1 a and b,
Intersection XZ on the line connecting X ₁ −X ₂ , Y ₁ −Y ₂ , Z ₁ −Z ₃
indicates the exposure center.

When using such a device, the device is placed at a desired position by moving the moving block 2 along the rail 1, and the top plate 9 is moved to the position D ₁ shown in the figure.
-D By moving in _two directions, the subject 8 on the top plate 9 is positioned at the center of the apparatus, and desired imaging is performed. That is, the support arm 4 is moved in the C ₁ and C ₂ directions shown in the figure.
Since the outer ring 5 can be rotated in the directions B ₁ and B ₂ in the figure, and the inner ring 11 can be rotated in the directions A ₁ and A ₂ in the figure, these combined rotation operations can rotate the X-ray tubes 21a and 21a. 21b and the imaging devices 22a, 22b facing each other, it is possible to take pictures at all angles while moving them in all directions. In this way, it becomes possible to photograph the subject 8 (spherical) at all angles. In this case, since the mounting positions of the X-ray tube and the imaging device do not change, there is no interference with the equipment. Further, the tip of the support arm 4 is bent into an L-shape, and a corresponding protrusion 5a is provided on the outer ring 5 to connect the two, and the connecting portion is the center of rotation around the horizontal rotation shaft 6. , the exposure center XZ can be kept constant at all times regardless of the position of the X-ray tube and imaging device, and for example, the amount of horizontal movement required to position the subject when imaging the heart. (Illustrated
D ₁ −D ₂ direction) can be reduced, and
The operator can easily confirm the X-ray irradiation center XZ, and the imaging device can reciprocate smoothly. Furthermore, the inner ring 11 has a support rod 14 and rollers 12 and 13 attached to its tip in two directions, and the outer ring 5 is provided with a guide groove, so that when the inner ring 11 rotates, it follows a circular trajectory. There's no way you can get away from it. Furthermore, since it can be moved along the rails provided on the ceiling, placement and evacuation operations become easier. Furthermore, since the two X-ray devices are installed on the circumference, the device can be made smaller than in the conventional case.

According to the present invention described in detail above, the operability is excellent,
It is possible to provide an X-ray imaging apparatus that occupies a small area and improves diagnostic performance. Furthermore, although a specific example of the present invention has been explained using a ceiling suspension running system, a floor standing running system in which rails are installed on the floor may be used.

[Brief explanation of the drawing]

FIGS. 1a and 1b are a front view and a side view showing an embodiment of the apparatus of the present invention. DESCRIPTION OF SYMBOLS 1... Rail, 2... Moving block, 4... Forked support arm, 5... Outer ring, 11... Inner ring, 21a, 21b... X-ray tube, 22a, 22
b...imaging device.

Claims (1)

[Claims] 1. A moving block movably supported along the floor or ceiling, a support arm rotatably attached to the movable block, an outer ring rotatably supported by the support arm, and an outer ring rotatably supported by the support arm. an inner ring mounted on the inner peripheral surface of the ring so as to be able to move circularly;
A plurality of Xs arranged opposite to each other on the circumferential surface of the inner ring
An X-ray imaging device comprising a ray tube and an imaging device.